import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Sigin from '../components/Sigin'
import Home from '../components/Home'
import Welcome from '../components/Welcome'
import users from '../components/user/Users'
Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    redirect:'/login'
  },
  {
    path: '/login',
    component: Login
  },
  {
    path: '/sigin',
    component: Sigin
  },
  {
    path: '/home',
    component: Home,
    redirect:'/Welcome',
    children:[{path:'/Welcome', component:Welcome},{path:'/users', component:users}]
  },
]

const router = new VueRouter({
  routes
})

//挂载路导航守卫
router.beforeEach((to, from, next) => {
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  if(to.path === '/login') return next()
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})
export default router
